Hi Ron Solberg etc All small wind turbines like my Bergey XL-1 have boost converters on them to change the varying voltage to a constant float voltage for the L16 batteries you mentioned. 13.8v is maintained per 12v increment or for your 48v system you would use a 55.2v boost regulator for float and 60V to equalize monthly (with equalize button). I used a Micrel (Google data sheet) MiC2171bu on a 24v wind turbine I had that took 6-24v in and converted up to 30v out with a bypass low drop Schottky diode when overspeeding. Look at SMA Windy Boy controller or Berger.com. Have a renewable energy day, Mark Reevadiy.org
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